prosthetic metacarpal - falangea and interfalangea for joints of the hand or foot

摘要

a prosthetic matacarpo - falangea and / or interfalangea (1), particularly for the joints of the hand or foot, includes a pair of blades (2)3) implanted in bone adjacent to a joint to be restored and connected by a flexible coupling (4) encapsulated in a protective shell formed of biocompatible material with the samethe stems. the biocompatible material may be a mixture of plastic resins and high compatibility.the casing is composed of a pair of semigusci (5)6) attached to the respective stems which extend axially from opposite sides with respect to a longitudinal plane of symmetry (s) intersecante perpendicular to the axis of rotation (a) of the time.in a first form of implementation.the axis (a) is defined by a cylindrical bar (13) mounted in axial cavity of semigusci and free to rotate with respect to at least one of them with limited flexibility in a plan perpendicularthe axis of rotation (a). in a second form of realization, the candy bar (13) is replaced by an extension cylinder (13) or semisferica (13 ') of one of the stems.the axis (a) may be defined by a helical spring (14, 17) or wire elastic axial (23, 24) anchored to the stems with bars transverse ends (25, 26).